This passive infrared detector is able to monitor an area up to 100 degrees wide. With the integral mask, the detection area can be narrowed down to 20 degrees or anywhere in between. With the swivel mount, this sensor can be adjusted right to left up 80 degrees and down to 50 degrees. With three different sensitivity settings, the IR-3000 can detect a person up to 12 feet, 25 feet or 40 feet away. The sensor can be set to flash an LED or stay dark when a signal is sent. Powered by one 9 volt battery and has a battery life of about 12 months under normal conditions. Features low battery alert, four different tones, (Classical, Westminster Chime, Ding Dong or Whistle) volume control and can be user programmed. The transmitter is designed for indoor or light duty outdoor use under an eave or awning or other protected location. The receiver plugs into any standard wall outlet and can be placed on a table or mounted on the wall.